I hate it when you’re in the middle of writing something and your plane’s boarding call is announced. You have to then decide if you can finish to your satisfaction within the next five or ten minutes or if you should bail and board and finish the piece once the plane is 10,000 feet up and getting Gogo on-board wifi (which now cost $25 per flight). Either way the initial announcement shatters the concentration so you might as well stop and board.